#!/bin/bash -p

# Copyright 2015 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Using codesign, sign the installer tools. After signing, the signatures are
# verified.

set -eu

# Environment sanitization. Set a known-safe PATH. Clear environment variables
# that might impact the interpreter's operation. The |bash -p| invocation
# on the #! line takes the bite out of BASH_ENV, ENV, and SHELLOPTS (among
# other features), but clearing them here ensures that they won't impact any
# shell scripts used as utility programs. SHELLOPTS is read-only and can't be
# unset, only unexported.
export PATH="/usr/bin:/bin:/usr/sbin:/sbin"
unset BASH_ENV CDPATH ENV GLOBIGNORE IFS POSIXLY_CORRECT
export -n SHELLOPTS

ME="$(basename "${0}")"
readonly ME

if [[ ${#} -ne 3 ]]; then
  echo "usage: ${ME} packaging_dir codesign_keychain codesign_id" >& 2
  exit 1
fi

packaging_dir="${1}"
codesign_keychain="${2}"
codesign_id="${3}"

enforcement_flags="restrict,library-validation,kill"

executables=(goobspatch xzdec)
libraries=(liblzma_decompress.dylib)
declare -a everything

for executable in "${executables[@]}"; do
  sign_path="${packaging_dir}/${executable}"
  everything+=("${sign_path}")

  codesign --sign "${codesign_id}" --keychain "${codesign_keychain}" \
      "${sign_path}" --options "${enforcement_flags}"
done

for library in "${libraries[@]}"; do
  sign_path="${packaging_dir}/${library}"
  everything+=("${sign_path}")

  codesign --sign "${codesign_id}" --keychain "${codesign_keychain}" \
      "${sign_path}"
done

for sign_path in "${everything[@]}"; do
  codesign --verify --deep -vvvvvv "${sign_path}"
done